y=(exp(-0.5*x*x))/(2*pi)matlab有错吗

Y =exp{ A + C * exp {- exp [- B *(X - M)]}} 变形为X=? Z=exp(-(X.^2+Y.^2)/2^2);中exp的意义和作用是什么? Input argument x is undefined.function y=f(x) y=exp(-x)+exp(x); y=(exp(-0.5*x*x))/(2*pi)matlab有错吗 matlab中z=x.*exp(-0.5*x.^2-Y.^3) 用matlab怎么画图,比如y =exp(x^2)? matlaB中str1='exp(-(x-4)^2-(y-4)^2)+exp(-(x+4)^2-(y-4)^2)'; str1='exp(-(x-4)^2-(y-4)^2)+exp(-(x+4)^2-(y-4)^2)';str2='+2*exp(-x^2-(y+4)^2)+2*exp(-x^2-y^2)';rt啥意思? 下面的MATLAB程序哪里错了,怎么出来都是一条直线呀?x=0.5:0.02:1.3;z=0.6*x./(1-2*x);y=(0.6*x.*(exp(-5*z))/(1-exp(-3*z))-x+0.6*x.*exp(-2*z)-0.6*x.*exp(-5*z))/z;plot(x,y) matlab微分方程soln_1 = dsolve('Dy = 3*x^2','y(2)=0.5')soln_1 =3*x^2*t-6*x^2+1/2 soln_3 = dsolve('Dy = 3*y + exp(2*x)',' y(0) = 3')soln_3 =-1/3*exp(2*x)+exp(3*t)*(1/3*exp(2*x)+3)为什么全和答案不一样 那个t是什么东西 如何用matlab解非线性方程组,求写成程序,万分感激!E1=-1/2/(betainc(1-y/x,1.5,y+1)+(y/x).^y*exp(x-y)*sqrt(1-y/x)*exp(y-x)/x+(y/x).^y*exp(x-y)*sqrt(pi)/2/x>^1.5*erfc(sqrt(x-y)))*(2/z.^2+1/k.^2)*(2/3*y*((y-2)*0.5*betainc(1-y/x,0.5,y-1)-( matlab的exp函数x=[0:0.001:2]y=x*exp(-2*x)plot(x,y)为什么会－－－y=x*exp(－2＊x)Error using ==> *Inner matrix dimensions must agree Unexpected MATLAB operator.[x,y]=meshgrid(100:1:500,-200:1:200);z=10./(2*pi.*(4+(2.*x./(x.^2+y.^2).^0.5)).*0.044.*x.^2.*((1+0.0001.*x).^0.5)).exp(-y.^2./(2.*(0.22.*x*(1+0.0001.*x)).^0.5)).*(exp(-9.^2./(0.08.*x.^2))+exp(-11.^2./(0.08.*x.^2)));shading matlab 绘制分段函数 x>=1,y=exp(-(x-1)^2),x MALAB:x^2 -y^3 =0,exp(-x)=y.用matlab咋解?要源程序. 2y=erfc+exp(0.1*x)*erfc用matlab画y关于x的图像 matlab求导数Clear, dx = 0.01*2*pi ;x = 0:dx:2*pi ;y =exp(-0.5*x)*sin(2*x);F1=diff(y)/dx;F1=[f1(1),(f1(1:end-1)+f1(2:end))/2,f1(end)];Figure,plot(x, -0.5*exp(-0.5*x)*sin(2*x)+2 exp(-0.5*x)*cos(2*x),x,f1,’.’)Y=sym(‘exp(-0.5*x)*sin(2*x)’);Dy MATLAB c=(Q^exp(0.47*x)/(pi*u*200*73.76))^exp(-0.5*(y^2/200^2+104.316^2/73.76^2)) 哪里用点乘 求教 matlab中为什么y=2*exp(-0.5*x)*cos(4*pi*x)会报错如题,为什么要改成y=2*exp(-0.5*x).*cos(4*pi*x).为什么要用点乘